Water Structure in Water/KDEHP-HDEHP/n-Heptane Microemulsion by FTIR Spectroscopy

The structure of water in microemulsion is one of the basic subjects in the field of surface science. FTIR spectroscopy is considered as a powerful tool in the study on water structure. In this paper, we investigated water structure in the water/ KDEHP (potassium bis (2-ethylhexyl) phosphate) -HDEHP/n-Heptane system. By using the Fourier self-deconvolution and curve-fitting method, the OH stretching band of water in the KDEHP-HDEHP microemulsion was resolved into four subpeaks which were tentatively assigned to absorbances of four different components of water. In order to explain the variations of peak positions of subpeaks with water content some probable hydration models of surfactants were proposed.EI02170-1721